<template>
    <div class="cart">
      <Header></Header>
      <div class="cart_info">
        <div class="cart_title">
          <span class="text">我的购物车</span>
          <span class="total">共{{$store.state.total}}门课程</span>
        </div>
        <div class="cart_table">
          <div class="cart_head_row">
            <span class="doing_row"></span>
            <span class="course_row">课程</span>
            <span class="expire_row">有效期</span>
            <span class="price_row">单价</span>
            <span class="do_more">操作</span>
          </div>
          <div class="cart_course_list">
            <CartItem v-for="cart in cart_list" :key="cart.id" :cart="cart" @delete="deleteHander" @changeprice="calc_total"></CartItem>
          </div>
          <div class="cart_footer_row">
            <span class="cart_select"><label> <el-checkbox v-model="checked"></el-checkbox><span>全选</span></label></span>
            <span class="cart_delete"><i class="el-icon-delete"></i> <span>删除</span></span>
            <span class="goto_pay"><router-link  to="/order">去结算</router-link></span>
            <span class="cart_total">总计：¥{{total}}</span>
          </div>
        </div>
      </div>
      <Footer></Footer>
    </div>
</template>

<script>
import Header from "./common/Header"
import Footer from "./common/Footer"
import CartItem from "./common/CartItem"
export default {
    name: "Cart",
    data(){
      return {
        cart_list: [],  // 购物车的商品信息
        checked: false,
        total: 0,    // 购物车中被勾选付款商品的总价格
      }
    },
    created(){
        this.user_token = this.check_user_login();
        this.get_cart();
    },
    methods:{
        check_user_login(){
            // 检查用户是否登录了
            let user_token = localStorage.user_token || sessionStorage.user_token;
            if(!user_token){
                this.$confirm('对不起，您尚未登录，请登录后继续操作！', '警告').then(response=>{
                    this.$router.push('/login');
                })
            }
            return user_token;
        },
        calc_total(){
            // 计算总价格
            let total = 0;
            for (let item in this.cart_list){
                if (this.cart_list[item].is_selected){
                    total += parseFloat(this.cart_list[item].price);
                }
            }
            this.total = total.toFixed(2);
        },
        get_cart(){
            // 获取购物车的商品列表
            this.$axios.get(`${this.$settings.Host}/cart/course/get`, {
                headers: {
                    'Authorization': 'jwt ' + this.user_token,
                }
            }).then(response=>{
                this.cart_list = response.data;
                this.calc_total();
            }).catch(error=>{
                console.log(error.response.data)
            })
        },
        deleteHander(course_id){
            // 删除购物车中的商品
            for (let item in this.cart_list){
                if(this.cart_list[item].id == course_id){
                    this.cart_list.splice(item, 1);
                }
            }
            this.calc_total();
        },
    },
    components:{
      Header,
      Footer,
      CartItem,
    }
}
</script>

<style scoped>
.cart_info{
  width: 1200px;
  margin: 0 auto 200px;
}
.cart_title{
  margin: 25px 0;
}
.cart_title .text{
  font-size: 18px;
  color: #666;
}
.cart_title .total{
  font-size: 12px;
  color: #d0d0d0;
}
.cart_table{
  width: 1170px;
}
.cart_table .cart_head_row{
  background: #F7F7F7;
  width: 100%;
  height: 80px;
  line-height: 80px;
  padding-right: 30px;
}
.cart_table .cart_head_row::after{
  content: "";
  display: block;
  clear: both;
}
.cart_table .cart_head_row .doing_row,
.cart_table .cart_head_row .course_row,
.cart_table .cart_head_row .expire_row,
.cart_table .cart_head_row .price_row,
.cart_table .cart_head_row .do_more{
  padding-left: 10px;
  height: 80px;
  float: left;
}
.cart_table .cart_head_row .doing_row{
  width: 78px;
}
.cart_table .cart_head_row .course_row{
  width: 530px;
}
.cart_table .cart_head_row .expire_row{
  width: 188px;
}
.cart_table .cart_head_row .price_row{
  width: 162px;
}
.cart_table .cart_head_row .do_more{
  width: 162px;
}

.cart_footer_row{
  padding-left: 30px;
  background: #F7F7F7;
  width: 100%;
  height: 80px;
  line-height: 80px;
}
.cart_footer_row .cart_select span{
  margin-left: 7px;
  font-size: 18px;
  color: #666;
}
.cart_footer_row .cart_delete{
  margin-left: 58px;
}
.cart_delete .el-icon-delete{
  font-size: 18px;
}

.cart_delete span{
  margin-left: 15px;
  cursor: pointer;
  font-size: 18px;
  color: #666;
}
.cart_total{
  float: right;
  margin-right: 62px;
  font-size: 18px;
  color: #666;
}
.goto_pay{
  float: right;
  width: 159px;
  height: 80px;
  outline: none;
  border: none;
  background: #ffc210;
  font-size: 18px;
  color: #fff;
  text-align: center;
  cursor: pointer;
}
</style>
